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(No Model.)

B; T. STARR. DENTI STS VULGANIZING FLASK. No. 246,234. 1 725.1,

Patented Aug-23,1881. y 2;

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N. PETERS, Phnlvbthngnpher, Wiahingtan, D. C,

Ilsrra STATES ATENT O Price.

ELI T. STARR, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JAMES W. WHITE, JAMES CLARENCE WHITE, AND H. M. LEWIS, TRUSTEES, ALL OF SAME PLACE.

DENTISTS VULCANIZING-FLASK.

SPECIFICATION forming part of Letters Patent No. 246,234, dated August 23, 1881.

Application filed July 6, 1881. (No model.)

To all whom it may concern:

Be it known that I, ELI T. STARR, of the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Dentists Vulcanizing-Flasks, of which the following is a speci fication.

My invention relates to sectional flasks of the class used by dentists in vulcanizing and heating apparatus for the formation of artificial dentures; and it consists, first, ot' a flask composed of two open rings or sections detachably connected together attheiradjacent edges, as usual, and titted upon their opposite edges to receive detachable topand bottom plates to make a closed flask, said plates being interchangeable, so as to permit the flask-rings to be reversed or either ring or section of the flask to be made the top ring or section; and, secondly, of the combination of two open flask rings or sections having detachable interchangeable top and bottom plates to make a closed flask, with arms or links, each hinged or connected at one end to thelower plate, and fitted at their upper ends to overlap the top plate and receive keys or wedges to fasten all the parts of the flask together when closed, so that the flask may be freely handled without its sections or parts becoming detached.

In the accompanying drawings, Figure 1 is a bottom-plan view, and Fig. 2a top-plan view, of my improved flask. Fig. 3 is a view of one side of the inverted flask, and Fig. 4 a view from another side of said flask, showing clearly one of the interlocking pin-connections of the open rings or flask-sections. Fig. 5 is a vertical central section through the inverted flask, on the line 5 5 of Fig.1; and Fig. 6 is a section therethrough on the line 6 6 of Fig. 2.

It will be unnecessary to mention the manner of packing the rings or flask-sections with the impressions, models, or dies, which are to give shape to the material which is to form the plate to carry the teeth, as this is well understood by those skilled in the art.

The open flask rings or sections A B are two in number, as usual, and said rings are detachably connected together preferably by two interlocking lug and pin connections, one on each side of the flask, as clearly shown in Figs. 1 and 2. The pins a a are tapered and rigidly connected at their base to lugs or ears a a, projecting from the sideof the ring or section A, and said pins pass, when the two rings or sections A B of the flask are fitted together, through eyes or openings in lugs or ears I) b projecting from the ring or section B. (See Fig. 4.)

Top and bottom plates, G D, are fitted to the rings or sections A B of the flask, no as to make aclosed flask, and these plates are interchangeablethat is to say, the plates fit equally well to close the flask whichever ring or section thereof may be the top section, whereby the flask sections are rendered reversible, and either may be placed at the top or bottom. Each ring or section A B in this example is provided in its outer edge, or that upon which the plates lit, with three grooves, 0, one at each side of the ring, and corresponding tongues or ribsfon the inner sides or faces of the top and bottom plates, 0 D, fit these grooves when said plates are fitted closely upon said flask rings or sections. The result of this connection is that either plate may be applied to either ring or section to close it, and they are thus rendered interchangeable.

In order to fasten the sections of the flask, including the top and bottom plates, securely together when closed by the press or by the clamp or screw of the vulcanizer or heater, so as to permit the flask to be handled without dangerofdisconnecting its sections, Icast witlnorotherwise form upon, the outer or bottom surface of the bottom plate, D, preferably three lugs or projections, h h h, of hook form, over which the lower ends of three arms orlinks, E, are fitted by means of eyes or openings formed in said arms. The upper ends of these arms or links are enlarged or provided with beaks 1', so as to 0 overlap the top plate, (3, ot' the flask, the said beaks fitting recesses a, formed in said plate. On each side of the said recesses c are grooved lugs c, in which are seated cylindrical wedges or keys F, three in number, and one for each 5 armorlinkE, and each wedgeis passed through a lateral opening in the beak t' of its arm or link E, so as to tightly draw the flask-sections with their top and bottom plates together and securely fasten them to prevent their aceiden tal separation during the handling of the flask.

Instead of the lugs or hook-projections It on one of the plates to fit the eyes or openings in the arms or links E and the recesses 0 in the other plate to receive the shouldered enlargements or beaks t of said arms or links, I may substitute seats in one of the plates for the cross-pins or T-shaped heads of round straight bolt-arms to fit said bolt-arms to swing or rock, and merely pass the wedges or tapered keys through openings in the opposite ends of the bolt-arms to act upon the opposite plate in order to lock the parts of the flask firmly together. It will be obvious that by the three arms, bolts, or links one for each side of the heartshaped flask-the flask will be evenly and uniformly fastened or secured on all sides.

All that is necessary to separate the flasksections is a simple removal of the Wedges or keys, which operation permits the arms or links E to be rocked back on their hinge or hook connection with the bottom plate of the flask or to be detached, and enables the flask-sections to be readily separated.

I claim as my invention 1. A dentists flask constructed,substantially as hereinbefore set forth, of open rings or sections detachably connected together, and with detachable and interchangeable top and bot tom plates, to make a closed flask.

2. The combination, substantially as hereinbefore set forth, of open flask rings or sections having interchangeable top and bottom plates, with arms, bolts, or links, each connected at one end to one of said plates, and provided at the opposite end with an opening to receive a Wedge or key acting upon the other of said plates.

In testimony whereof I have hereunto subscribed my name this 2d d ay of July, A. D. 1881.

ELI T. STARR.

Witnesses:

FRANK L. HIsE, W. R. POTTER. 

